QDTL Liquid Mass Transfer and Diffusion Coefficient Unit www.edibon.com

Liquid Mass Transfer and Diffusion
Coefficient Unit
QDTL
Technical Teaching Equipment
www.edibon.com
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Products range
Units
11.-Chemical
Engineering
Electronic console
PROCESS DIAGRAM AND UNIT ELEMENTS ALLOCATION
Worlddidac
Member
ISO 9000: Quality Management
(for Design, Manufacturing,
Commercialization and After-sales service)
European Union Certificate
(total safety)
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Certificates ISO 14000 and
ECO-Management and Audit Scheme
(environmental management)
Worlddidac Quality Charter
Certificate
(Worlddidac Member)
GENERAL DESCRIPTION
The QDTL is a teaching unit that allows the students to familiarise with the notions of mass transfer theory, specially the diffusion in liquid
systems, obtaining experimental data and results which are very useful for an ideal practice understanding of the process and
consequently, for the technical teaching of the students.
The experimental determination of the diffusion coefficient DAB for a binary mixture, can be performed with a device such as the one
described below.
A small volume tube with a filtering cell which has a certain number of pores has been placed at one of its ends. A concentrated solution of
salt (sodium chloride) has been introduced inside. The tube is introduced in a vessel with pure solvent (distilled water). Now, the diffusion
starts, and it will be indirectly measured by the conductivity data.
A thermostatic bath allows us to make the experiments at different temperatures.
SPECIFICATIONS
Bench-top unit.
Anodized aluminium structure and panels in painted steel.
Main metallic elements in stainless steel.
Diagram in the front panel with similar distribution to the elements in the real unit.
Transparent tank for liquids (experimentation vessel), capacity: 2.5 l.
Magnetic stirrer (range: 0-300 rpm) and magnet.
Conductivity meter and conductivity cell:
Conductivity
Range
Measurement
200 S
0.1 to 199.9 S
Resolution
0.1 S
2 mS
0.2 to 1.999 mS
0.001 mS
20 mS
2 to 19.99 mS
0.01 mS
S - micro Siemens; mS- milli Siemens.
Temperature
Measurement range= 0 ºC to 60 ºC.
Resolution= 0.1 ºC.
Accuracy= 0.8ºC.
Diffusion cell:
Capillaries number (N) = 317.
Capillary length (x) = 5 mm.
Capillary diameter (D) = 1 mm.
Thermostatic bath:
Water vessel, capacity: 8 l.
Heating element, 500 W.
Level switch.
Temperature sensor “J type”.
Electronic console:
Metallic box.
Temperature sensor connection.
Heating resistance switch.
Heating element temperature controller.
Level switch connection.
Stirrer switch.
Cables and Accessories, for normal operation.
Manuals: This unit is supplied with following manuals: Required Services, Assembly and Installation, Starting-up, Safety, Maintenance &
Practices Manuals.
EXERCISES AND PRACTICAL POSSIBILITIES
1.- Fick´s law application to calculate the diffusivity.
5.- Simple analysis of a first order unsteady state process.
2.- Accurate measurement of mass transfer rates.
6.- Concentration and conductivity relation.
3.- Determination of the molar density rate.
7.- Study of the temperature effect on diffusion coefficients.
4.- Effect of concentration on diffusion coefficients.
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REQUIRED SERVICES
DIMENSIONS & WEIGHT
- Electrical supply: single-phase, 220V./50Hz or 110V./60Hz.
QDTL:
Unit:
- Distilled water.
-Dimensions: 500 x 370 x 500 mm. approx.
(19.68 x 14.56 x 19.68 inches approx.)
- NaCl.
-Weight:
20 Kg. approx.
(44 pounds approx.).
RECOMMENDED ACCESSORIES
Electronic console: -Dimensions: 300 x 230 x 135 mm. approx.
(11.81 x 9.05 x 5.31 inches approx.)
- Stop Clock.
-Weight:
- Scale.
(4.4 pounds approx.).
AVAILABLE VERSIONS
Offered in this catalogue:
- QDTL.
2 Kg. approx.
Liquid Mass Transfer and Diffusion Coefficient Unit.
Offered in other catalogue:
- QDTLC. Computer Controlled Liquid Mass Transfer and Diffusion Coefficient Unit.
*Specifications subject to change without previous notice, due to the convenience of improvements of the product.
REPRESENTATIVE:
C/ Del Agua, 14. Polígono Industrial San José de Valderas.
28918 LEGANÉS. (Madrid). SPAIN.
Phone: 34-91-6199363 FAX: 34-91-6198647
E-mail: [email protected] WEB site: www.edibon.com
Issue: ED02/13
Date: October/2013
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